Preparation method of cyclohexanol gaseous phase dehydrogenated cyclohexanone catalyst
A gas-phase dehydrogenation and catalyst technology, applied in the preparation of organic compounds, carbon-based compounds, chemical instruments and methods, etc., can solve the problems of low selectivity and low activity, save social resources and reduce catalyst unit consumption. Effect
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Embodiment 1
[0012] Catalyst preparation is carried out in an open reactor, according to the following steps to implement. Get 1000ml of 1.0M copper nitrate solution and 50ml of 1.0M magnesium nitrate solution to be mixed with mixed solution a. In a sedimentation tank with stirring, sodium carbonate solution and 1048 grams of silica sol JN-25 are coprecipitated, and the precipitation temperature is controlled at 55°C, then aged at 70°C for 30 minutes, then added solution a to the above precipitation, controlled the precipitation temperature at 60°C, added oxalic acid solution to make the pH of the precipitation end point 7.2, washed, dried, pulverized, and roasted at 350°C , adding appropriate amount of water and graphite, and finally pressing into tablets to obtain a usable catalyst.
Embodiment 2
[0014] Catalyst preparation is carried out in an open reactor, according to the following steps to implement. Get 1000ml of 1.0M copper nitrate solution and 50ml of 1.0M magnesium nitrate solution to be mixed with mixed solution a. In a sedimentation tank with stirring, sodium carbonate solution and 1048 grams of silica sol JN-25 are coprecipitated, and the precipitation temperature is controlled at 65°C, then aged at 70°C for 20 minutes, then added solution a to the above precipitation, controlled the precipitation temperature at 65°C, added oxalic acid solution to make the pH of the precipitation end point 7.2, washed, dried, pulverized, and roasted at 450°C , adding appropriate amount of water and graphite, and finally pressing into tablets to obtain a usable catalyst.
[0015] The copper content of the catalyst is 19.5%, and the specific surface area is 268.4m 2 / g, pore volume 0.33ml / g, average pore diameter 4.6nm.
Embodiment 3
[0017] Catalyst preparation is carried out in an open reactor, according to the following steps to implement. Take 1000ml solution a of 1.0M copper nitrate solution, co-precipitate the sodium carbonate solution and 958 grams of silica sol JN-25 in a sedimentation tank with stirring, control the precipitation temperature at 60°C, then age at 72°C for 30min, and then Add solution a to the above precipitation, the precipitation temperature is 70°C, add oxalic acid solution to make the pH value of the end point of the precipitation is 7.2, after washing, drying, crushing, roasting at 380°C, adding appropriate amount of water and graphite, and finally pressing into tablets, that is available catalysts.
[0018] The copper content of the catalyst is 20.6%, and the specific surface area is 190.5m 2 / g, pore volume 0.32ml / g, average pore diameter 3.8nm.
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